Piazzi Smyth is a small lunar

Moon

The Moon is Earth's only known natural satellite,There are a number of near-Earth asteroids including 3753 Cruithne that are co-orbital with Earth: their orbits bring them close to Earth for periods of time but then alter in the long term . These are quasi-satellites and not true moons. For more...

 impact crater

Impact crater

In the broadest sense, the term impact crater can be applied to any depression, natural or manmade, resulting from the high velocity impact of a projectile with a larger body...

 in the eastern part of the Mare Imbrium

Mare Imbrium

Mare Imbrium, Latin for "Sea of Showers" or "Sea of Rains", is a vast lunar mare filling a basin on Earth's Moon and one of the larger craters in the Solar System. Mare Imbrium was created when lava flooded the giant crater formed when a very large object hit the Moon long ago...

. This is an isolated feature located about 100 kilometers to the southwest of the Montes Alpes

Montes Alpes

Montes Alpes is a mountain range in the northern part of the Moon's near side. It was named after the Alps in Europe.This range forms the northeastern border of the Mare Imbrium lunar mare. To the west of the range is the level and nearly featureless mare, while on the eastern face is a more rugged...

 mountain range. To the southeast of this crater is Mons Piton

Mons Piton

Mons Piton is an isolated lunar mountain that is located in the eastern part of the Mare Imbrium, to the north-northwest of the crater Aristillus. Due east of Mons Piton is the flooded crater Cassini, and to the west-northwest lies Piazzi Smyth...

, an isolated mountain that rises to a height of 2.3 km and occupies a diameter of about 25 km.

This crater is a nicely circular feature with a rim and interior that have not been significantly modified by impacts. The inner walls slope smoothly downwards to the small floor about the mid-point, which occupies a diameter of only one-fifth the total diameter of the crater. This formation has no other notable features, and its albedo

Albedo

Albedo , or reflection coefficient, is the diffuse reflectivity or reflecting power of a surface. It is defined as the ratio of reflected radiation from the surface to incident radiation upon it...

 matches the surrounding lava

Lava

Lava refers both to molten rock expelled by a volcano during an eruption and the resulting rock after solidification and cooling. This molten rock is formed in the interior of some planets, including Earth, and some of their satellites. When first erupted from a volcanic vent, lava is a liquid at...

plain.

Satellite craters

By convention these features are identified on lunar maps by placing the letter on the side of the crater mid-point that is closest to Piazzi Smyth.

Piazzi Smyth	Latitude	Longitude	Diameter
B	40.5° N	3.4° W	4 km
M	45.0° N	4.2° W	2 km
U	40.8° N	2.7° W	3 km
V	40.9° N	4.7° W	7 km
W	42.2° N	1.9° W	3 km
Y	42.8° N	3.4° W	4 km
Z	42.1° N	4.6° W	3 km